CN1482691B - Display device with anthracene and triazine derivatives - Google Patents

Display device with anthracene and triazine derivatives Download PDF

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CN1482691B
CN1482691B CN031328881A CN03132888A CN1482691B CN 1482691 B CN1482691 B CN 1482691B CN 031328881 A CN031328881 A CN 031328881A CN 03132888 A CN03132888 A CN 03132888A CN 1482691 B CN1482691 B CN 1482691B
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carbon atom
triazine derivatives
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anthracene derivant
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CN1482691A (en
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H·阿兹兹
胡南星
Z·D·波波维克
A·-M·霍尔
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LG Display Co Ltd
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    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
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    • H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
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    • H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/917—Electroluminescent

Abstract

A device includes: an anode; a cathode; and a luminescent region between the cathode and the anode, wherein the luminescent region includes an anthracene derivative compound and a triazine derivative compound.

Description

The display device that contains anthracene and pyrrolotriazine derivatives
The cross reference of related application
The application is dividing an application of the female case of U.S. Patent Application Serial 10/207,686 (submission on July 26th, 2002), requires its priority at this.
Technical field
The present invention is directed to the demand of current existence, its objective is the performance of improving blue light-emitting OLED, more specifically, the objective of the invention is to improve the operational stability of device and strengthen its colorimetric purity.
Summary of the invention
The present invention is accomplished in many embodiments, and the device that is provided comprises:
Anode;
Negative electrode; With
Light-emitting zone between negative electrode and the anode, wherein light-emitting zone comprises anthracene derivant compound and triazine derivatives compounds, wherein the anthracene derivant compound is selected from structural formula I (A) (1)～I (A) (11), structural formula I (B), structural formula I (C) and structural formula I (D), and the triazine derivatives compounds is selected from structural formula II (A), II (B), II (C) and II (D), and wherein each structural formula and substituting group are illustrated in this article.
(1) term " layer " refers to the general simple layer different with the composition of adjacent layer of its composition.
(2) term " zone " refers to simple layer, a plurality of layer such as two-layer, three layers or multilayer, and/or one or more " subregions ".
(3) used term " subregion " refers to simple function district in simple layer, a plurality of floor, the floor or a plurality of functional areas in the floor in charge transfer subregion (being a hole transport subregion and electric transmission subregion) speech and luminous subregion one speech.
(4) anthracene derivant compound one speech refers to a class relevant not replacement and substituted compound, and these compounds all contain three fused benzene rings construction units shown in the identical following structural formula
Wherein this paper provides the illustrative example of this anthracene derivant compound.
(5) triazine derivatives compounds one speech refers to a class relevant not replacement and substituted compound, and these compounds all contain identical aromatic heterocycle construction unit, and wherein any three CH atoms of benzene are all replaced in adjacent or non-adjacent mode by nitrogen-atoms, such as 1,2,3,1,2,4,1,2,5,1,2,6 or 1,3,5.The replacement ratio of nitrogen-atoms is as can occurring in 1,3,5, shown in following structural formula:
Figure RE-S03132888120030731D000022
Wherein this paper provides the illustrative example of this triazine derivatives compounds.
(6) on function or rerum natura, can be equal to a part of regarding electrode or other non-luminous region as if contain the layer of anthracene derivant compound and/or triazine derivatives compounds, so in these embodiments for convenience's sake, just looking this layer that contains this anthracene derivant compound and/or triazine derivatives compounds in this article is the part of light-emitting zone.
(7) " non-anthracene and non-triazine derivatives compounds " speech refers to the compound except that anthracene derivant compound and triazine derivatives compounds.
Embodiment
Organic luminescent device of the present invention (" OLED ") comprises at least a anthracene derivant compound and at least a triazine derivatives compounds in its light-emitting zone.In order to realize the present invention, can adopt any suitable layer order and layer to form.
First illustrative embodiment is seen Fig. 1, and wherein OLED 110 constitutes in the indicated order: anode 120; Light-emitting zone 130; With negative electrode 140.
Second illustrative embodiment seen Fig. 2, and wherein OLED 210 constitutes in the indicated order: first electrode 220; Light-emitting zone 230, it is made of luminous subregion 230B and charge transfer subregion 230A; With second electrode 240.First electrode is if negative electrode, and then second electrode is exactly an anode; Perhaps first electrode is an anode, and second electrode is a negative electrode.The charge transfer subregion can be the hole transport subregion, and this moment, second electrode was an anode; Perhaps, the charge transfer subregion is the electric transmission subregion, and this moment, second electrode was exactly a negative electrode.
The 3rd illustrative embodiment seen Fig. 3, and wherein OLED 310 constitutes in the indicated order: anode 320; Optional resilient coating 322; Light-emitting zone 330, it is made of hole transport subregion 330A, luminous subregion 330B and electric transmission subregion 330C; With negative electrode 340.
For convenience's sake, the substrate of not drawing among Fig. 1-3; But know that any appropriate position of OLED shown in substrate can be in is such as contacting with one of them electrode.
Described at least a triazine derivatives compounds can be a kind of, two kinds, three kinds or multiple compound.If exist two or more triazine derivatives compounds, they can be the mixtures of geometric ratio or non-geometric ratio; Perhaps, the triazine derivatives compounds is unmixed form, such as being in the different layers respectively or being in the not same district of individual layer.In many embodiments, at least a triazine derivatives compounds can be regarded electron transport material as, and is more because electronics gets than hole transport in the triazine derivatives compounds.In many embodiments, except as the electric transmission body, many triazine derivatives compounds also can be used as the blue light emitting body, and promptly hole and electronics make up so that launch the material of the light in the blue chromatographic zone of visible spectrum therein.
Described at least a anthracene derivant compound can be a kind of, two kinds, three kinds or multiple compound.If exist two or more anthracene derivant compounds, they can be the mixtures of geometric ratio or non-geometric ratio; Perhaps, the anthracene derivant compound is unmixed form, such as being in the different layers respectively or being in the not same district of individual layer.At least a anthracene derivant compound can be the organic electroluminescence type material, and it can regard the blue light emitting body as, and promptly hole and electronics make up so that launch the material of the light in the blue chromatographic zone of visible spectrum therein.In many embodiments, many anthracene derivant compounds also can transporting holes, electronics or hole and electronics the two all can transmit, that its transmittability is divided into is poor, still can, good or excellent several etc.Because the anthracene derivant compound not only can be the blue light emitting body but also can be the charge-conduction body in many embodiments, this dual performance makes anthracene derivant compound residing position in OLED have more flexibility to a certain extent.
Described at least a anthracene derivant compound and at least a triazine derivatives compounds can be in one of described OLED, two or more layer, subregion or the zone, (wherein exist two or more anthracene derivant compounds among the OLED, these anthracene derivant compounds can be identical or different each other such as following exemplary OLED structure; And wherein exist two or more triazine derivatives compounds among the OLED, these triazine derivatives compounds can be identical or different each other):
(1) anode/luminous subregion (anthracene derivant compound)/electric transmission subregion (triazine derivatives compounds)/negative electrode.
(2) anode/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/electric transmission subregion (non-anthracene and non-triazine derivatives compounds)/negative electrode.
(3) anode/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/electric transmission subregion (triazine derivatives compounds)/negative electrode.
(4) anode/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/electric transmission subregion (anthracene derivant compound+triazine derivatives compounds)/negative electrode.
(5) anode/luminous subregion (anthracene derivant compound)/electric transmission subregion (anthracene derivant compound+triazine derivatives compounds)/negative electrode.
(6) anode/luminous subregion (anthracene derivant compound)/electric transmission subregion (contain the ground floor of anthracene derivant compound+triazine derivatives compounds and contain the second layer of triazine derivatives compounds)/negative electrode.
(7) anode/luminous subregion (anthracene derivant compound)/electric transmission subregion (contain the ground floor of anthracene derivant compound+triazine derivatives compounds and contain non-anthracene and the second layer of non-triazine derivatives compounds)/negative electrode.
(8) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/electric transmission subregion (triazine derivatives compounds)/negative electrode.
(9) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/electric transmission subregion (non-anthracene and non-triazine derivatives compounds)/negative electrode.
(10) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (anthracene derivant compound+triazine derivatives compounds)/negative electrode.
(11) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (triazine derivatives compounds)/negative electrode.
(12) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (triazine derivatives compounds)/electric transmission subregion (triazine derivatives compounds)/negative electrode.
(13) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (triazine derivatives compounds)/electric transmission subregion (non-anthracene and non-triazine derivatives compounds)/negative electrode.
(14) anode/hole transport subregion (anthracene derivant compound)/luminous subregion (non-anthracene and non-triazine derivatives compounds)/electric transmission subregion (triazine derivatives compounds)/negative electrode.
In 6,7, contain layer part that can regard luminous subregion as of anthracene derivant compound+triazine derivatives compounds with being equal to.
In 1～7, these structures are optional to comprise that further hole transport subregion (adjacent with anode), this subregion comprise anthracene derivant compound and/or non-anthracene and non-triazine derivatives compounds.
In 8～14, these are configured in optional non-anthracene and the non-triazine derivatives compounds of further comprising in the hole transport subregion (adjacent with anode).
The light-emitting zone that comprises anthracene derivant compound and triazine derivatives compounds can be one deck, two-layer or multilayer.Such as with regard to the individual layer light-emitting zone, anthracene derivant compound and triazine derivatives compounds are along depositing by different concentration on the whole bed thickness direction, thereby form two functional areas: luminous subregion (such as, anthracene derivant compound+triazine derivatives compounds) and the electric transmission subregion (such as, anthracene derivant compound+triazine derivatives compounds), anthracene derivant compound concentrations lower such as than in the luminous subregion in the electric transmission subregion wherein, perhaps optional even in the electric transmission subregion, do not contain the anthracene derivant compound fully.In many embodiments, the single luminescent layer that provides the mixture by anthracene derivant compound and triazine derivatives compounds to constitute, their concentration in whole layer all is uniform.The multilayer light-emitting zone is such as being made of following: the luminescent layer that contacts with charge transport layer; And the luminescent layer of boundary between hole transmission layer and electron transfer layer.
Luminous subregion can comprise a kind of anthracene derivant compound, the perhaps mixture of two or more anthracene derivant compounds.When adopting the mixture of two or more anthracene derivant compounds, the anthracene derivant compound can be any suitable weight ratio, such as same-size ratio or non-same-size ratio; The amount of a kind of compound in mixture is such as being 0.1 weight %～99.9 weight %, and surplus is another kind of compound.Except the anthracene derivant compound, charge transport materials can exist in luminous subregion, its concentration ratio is 0 weight %～about 95 weight % (based on luminous subregion) in this way, and surplus is the anthracene derivant compound, and its concentration is 100 weight %～about 5 weight % (based on luminous subregion).
Perhaps, luminous subregion can comprise a kind of triazine derivatives compounds, the perhaps mixture of two or more triazine derivatives compounds.When adopting the mixture of two or more triazine derivatives compounds, the triazine derivatives compounds can be any suitable weight ratio, such as same-size ratio or non-same-size ratio; The amount of a kind of compound in mixture is such as being 0.1 weight %～99.9 weight %, and surplus is another kind of compound.Except the triazine derivatives compounds, charge transport materials can exist in luminous subregion, its concentration is based on luminous subregion weight ratio 0 weight %～about 95 weight % in this way, and surplus is the triazine derivatives compounds, and its concentration is 100 weight %～about 5 weight % based on luminous subregion weight.
Also having a kind of may be that luminous subregion can comprise the mixture of anthracene derivant compound and triazine derivatives compounds.When adopting the mixture of two or more anthracene derivant compounds and triazine derivatives compounds, anthracene derivant compound and triazine derivatives compounds can be any suitable weight ratio separately, such as same-size ratio or non-same-size ratio; The amount of a kind of compound in mixture is such as being 0.1 weight %～99.9 weight %, and surplus is other compound.Except anthracene derivant compound and triazine derivatives compounds, charge transport materials also can exist in luminous subregion, its concentration (based on luminous subregion) weight ratio is 0 weight %～about 95 weight % in this way, surplus is anthracene derivant compound and triazine derivatives compounds, and its (based on luminous subregion weight) concentration is 100 weight %～about 5 weight %.
In many embodiments, luminous subregion can comprise the non-anthracene and the non-triazine derivatives compounds of one or more any suitable weight ratios, such as same-size ratio or non-same-size ratio.Adding one or more non-anthracenes and non-triazine derivatives compounds in luminous subregion can exert an influence to radiative colouring intensity or colorimetric purity, and this is that not add the luminous section post of one or more non-anthracenes and non-triazine derivatives compounds so inaccessible.In many embodiments of the present invention, manufacturing be the OLED of blue light-emitting; In other embodiments, by in light-emitting zone, adopting the set out OLED of other coloured light of suitable material manufacturing, such as in luminous subregion, adding one or more non-anthracenes and non-triazine derivatives compounds, blueness is changed over other color.
Charge transfer subregion (no matter being hole transport subregion or electric transmission subregion) comprises the mixture of two or more charge transport materials of a kind of charge transport materials or any suitable weight ratio, such as same-size ratio or non-same-size ratio; The amount of a kind of compound in mixture is such as being 0.1 weight %～99.9 weight %, and surplus is another kind of compound.The charge transfer subregion can comprise one or more anthracene derivant compounds, one or more triazine derivatives compounds, one or more non-anthracenes and non-triazine derivatives compounds, perhaps its any mixture.
Depend on OLED with which side to the observer, each layer of OLED can be transparent or opaque.Below by making up OLED of the present invention exemplary materials is described.
The substrate of substantially transparent can comprise various suitable materials, comprises such as polymers compositions, glass, quartz etc.The suitable polymer blend component includes but not limited to polyester, such as
Figure RE-S03132888120030731D000071
Merlon, polyacrylate, polymethacrylates, polysulfones etc.Also can select other base material.
The thickness of substrate is about 10～about 5,000 μ m, and more particularly about 25～about 1,000 μ m.
Anode can comprise suitable positive charge injection material, such as tin indium oxide (ITO), silicon, tin oxide and the work content metal for about 4eV～about 6eV, such as gold, platinum and palladium.Other suitable anode material includes but not limited to the carbon of conductivity, pi-conjugated polymer such as polyaniline, polythiophene, polypyrrole etc., and its work content is such as being equal to or greater than about 4eV, especially about 4eV～about 6eV.The anode of substantially transparent be such as can comprising tin indium oxide (ITO), extremely thin substantially transparent metal level, and it comprises work content and is the metals like gold of about 4eV～about 6eV, palladium etc., and its thickness is such as being pact
Figure RE-S03132888120030731D000072
～approximately , especially about
Figure RE-S03132888120030731D000074
～approximately
Figure RE-S03132888120030731D000075
The thickness of anode can be approximately
Figure RE-S03132888120030731D000076
Approximately Preferred thickness range will depend on the photoelectric constant of anode material.An example ranges of anode thickness is approximately
Figure RE-S03132888120030731D000078
～approximately
Figure RE-S03132888120030731D000079
Negative electrode can comprise suitable electronics injection material, such as metal, comprises high work content component, and such as the metal of work content for about 4eV～about 6eV, perhaps low work content component is such as the metal of work content for about 2eV～about 4eV.Negative electrode can comprise the combination of low work content (being lower than about 4eV) metal and at least a other metal.Low work function metal and second or effective percentage of other metal be less than about 0.1 weight %～about 99.9 weight %.The illustrative example of low work function metal includes but not limited to that alkali metal is such as lithium or sodium; 2A family or alkaline-earth metal are such as beryllium, magnesium, calcium or barium; With III family metal, comprise rare earth metal and actinide metals such as scandium, yttrium, lanthanum, cerium, europium, terbium or actinium.Lithium, magnesium and calcium are preferably low work function metal.Preferred cathode material is the Mg-Ag alloy cathode when in many embodiments, constituting negative electrode.Other special negative electrode comprises metal-organic mixed layer (MOML).Negative electrode can be made of lithium alloy and other high work function metal such as aluminium and indium.
The negative electrode of substantially transparent can comprise extremely thin substantially transparent metal level, it comprises the metal of work content for about 2eV～about 4eV, such as magnesium, silver, aluminium, calcium, indium, lithium and its alloy ratio such as Mg: the Ag alloy, this alloy ratio is as being made of the magnesium of about 80～95 volume % and the silver of about 20～about 5 volume %, and Li: Al alloy, this alloy ratio is as being made of the aluminium of about 90～99 volume % and the lithium of about 10～about 1 volume %, or the like, the thickness of this layer is such as being approximately
Figure RE-S03132888120030731D0000710
～approximately
Figure RE-S03132888120030731D0000711
Especially about
Figure RE-S03132888120030731D0000712
～approximately
The thickness of negative electrode is such as being about 10nm～about 1,000nm.
Among the OLED of the present invention used anode and negative electrode all can be separately individual layer or constitute by two-layer, three layers or multilayer.Such as, electrode can be made of electric charge injection layer (being electron injecting layer or hole injection layer) and confining bed.Yet in many embodiments, electric charge injection layer can be regarded as with electrode independent.
Electron injecting layer can comprise extremely thin substantially transparent metal level, it is that the metal of about 2eV～about 4eV constitutes by work content, such as magnesium, silver, aluminium, calcium, indium, lithium and its alloy, such as Mg: the Ag alloy, this alloy ratio is as being made of the magnesium of about 80～95 volume % and the silver of about 20～about 5 volume %, and Li: the Al alloy, and this alloy ratio is as being made of the aluminium of about 90～99 volume % and the lithium of about 10～about 1 volume %, or the like, the thickness of this layer is such as being pact
Figure RE-S03132888120030731D000081
～approximately
Figure RE-S03132888120030731D000082
Especially about ～approximately
Figure RE-S03132888120030731D000084
Electron injecting layer can comprise that also extremely thin insulating material is such as oxide material or alkali metal compound, referring to United States Patent (USP) 5,457,565; 5,608,287 and 5,739,635.
Hole injection layer can be made of suitable positive charge injection material, such as tin indium oxide (ITO), silicon, tin oxide and the work content metal for about 4eV～about 6eV, such as gold, platinum and palladium.Other suitable hole injection layer material includes but not limited to, conductive carbon, pi-conjugated polymer be such as polyaniline, polythiophene, polypyrrole etc., and its work content is such as being equal to or greater than about 4eV, especially about 4eV～about 6eV.The hole-injecting material of substantially transparent can be made of extremely thin substantially transparent metal level, and this layer comprises work content and be the metals like gold of about 4eV～about 6eV, palladium etc., and its thickness is such as being pact
Figure RE-S03132888120030731D000085
～approximately Especially about ～approximately Other suitable form of hole injection layer is referring to United States Patent (USP) 4,885, and 211 and 5,703,436.
In order to improve thermal stability, improve environmental stability and/or to improve the organic light-emitting device performance otherwise, on anode and/or negative electrode, can comprise confining bed.The example that improves the used confining bed of organic luminescent device thermal stability is by SiO, SiO 2Or the layer of its mixture formation.The example that improves the used confining bed of organic luminescent device environmental stability is the layer that is made of such as silver, aluminium, indium or gold stable metal.Other example that improves the used confining bed of organic luminescent device environmental stability is the layer that is made of low work function metal, referring to such as United States Patent (USP) 5,059,861.The thickness of confining bed is such as being about 20nm～about 5,000nm, perhaps about 50nm～500nm.
Resilient coating can some hole be injected and the material of transmission performance constitutes by having, and the purpose of why selecting this layer is to improve the performance of device.Resilient coating can with appropriate materials comprise the semiconductive organic material; Such as derivatives of porphyrin as 1,10,15,20-tetraphenyl-21H, 23H-porphyrin copper (II), referring to United States Patent (USP) 4,356,429, CuPc, tetramethyl CuPc; Phthalocyanine Zinc; Phthalocyanine oxidation phthalein; Magnesium phthalocyanine etc., and wherein CuPc is a preferred examples.Also can adopt the mixture of these materials and other appropriate materials.Other appropriate materials that can adopt in the resilient coating comprises semiconductive and insulating properties metal component, such as metal oxide such as MgO, Al 2O 3, BeO, BaO, AgO, SrO, SiO, SiO 2, ZrO 2, CaO, Cs 2O, Rb 2O, Li 2O, K 2O and Na 2O; And metal halide, such as LiF, KCl, NaCl, CsCl, CsF and KF.The thickness of resilient coating can be about 1nm～about 100nm, perhaps about 5nm～about 25nm, perhaps about 1nm～about 5nm.
The anthracene derivant examples for compounds comprises the anthracene derivant compound shown in the following formula.
Figure DEST_PATH_RE-G200310032888101D00011
Figure DEST_PATH_RE-G200310032888101D00021
Figure DEST_PATH_RE-G200310032888101D00041
Figure DEST_PATH_RE-G200310032888101D00051
Substituent R wherein 1, R 2, R 3, R 4, R 5, and R 6Be selected from independently of one another: the alkyl of hydrogen, 1～24 carbon atom; The alkoxyl of 1～9 carbon atom; The triphenyl silicyl; The aryl of optional substituted 6～20 carbon atoms; The heteroaryl of optional substituted 5～24 carbon atoms; Halogen is such as fluorine, chlorine, bromine; And cyano group.Hetero-atom in the heteroaryl is such as being: nitrogen, sulphur or oxygen.Aryl and heteroaryl optional by following illustrative with a part or different piece replace once, twice or repeatedly: the alkyl of 1～9 carbon atom; The alkoxyl of 1～9 carbon atom; Halogen is such as fluorine, chlorine, bromine; With cyano group etc.
Other anthracene derivant examples of compounds comprises United States Patent (USP) 5,972,247 disclosed those, the anthracene derivant compound of following formula is disclosed in this article:
Substituent R wherein 7, R 8, R 9And R 10Be selected from following each group independently of one another:
Group 1: hydrogen, the perhaps alkyl of 1～24 carbon atom;
Group 2: the aryl of optional substituted 6～20 carbon atoms;
Group 3: what constitute naphthyl, anthryl, pyrenyl Huo perylene base condenses the necessary carbon atom of aromatic rings;
Group 4: the heteroaryl of optional substituted 5～24 carbon atoms;
Group 5: furyl, thienyl, pyridine radicals or quinolyl condense assorted aromatic rings;
Alkoxyl, amino, alkylamino or the virtue of group 6:1～24 carbon atom are amino; With
Group 7: fluorine, chlorine, bromine or cyano group.
Hetero-atom in the heteroaryl is such as being: nitrogen, sulphur or oxygen.Aryl and heteroaryl optional by following illustrative with a part or different piece replace once, twice or repeatedly: the alkyl of 1～9 carbon atom; The alkoxyl of 1～9 carbon atom; Halogen is such as fluorine, chlorine, bromine; With cyano group etc.
Also have other anthracene derivant examples of compounds to comprise United States Patent (USP) 5,935, the anthracene derivant compound of 721 disclosed following formulas:
Substituent R wherein 11, R 12, R 13And R 14Be selected from following each group independently of one another:
Group 1: hydrogen, the perhaps alkyl of 1～24 carbon atom;
Group 2: the aryl of optional substituted 6～20 carbon atoms;
Group 3: what constitute naphthyl, anthryl, pyrenyl Huo perylene base condenses the necessary carbon atom of aromatic rings;
The optional substituted heteroaryl of group 4:5～24 carbon atom constitutes the assorted necessary carbon atom of aromatic rings of condensing of furyl, thienyl, pyridine radicals, quinolyl and other heterocyclic system;
Alkoxyl, amino, alkylamino or the virtue of group 5:1～24 carbon atom are amino; With
Group 6: fluorine, chlorine, bromine or cyano group.
Hetero-atom in the heteroaryl is such as being: nitrogen, sulphur or oxygen.Aryl and heteroaryl optional by following illustrative with a part or different piece replace once, twice or repeatedly: the alkyl of 1～9 carbon atom; The alkoxyl of 1～9 carbon atom; Halogen is such as fluorine, chlorine, iodine; With cyano group etc.
A preferred examples is 9 in general formula I (C) the anthracene derivant compound, 10-two-(2-naphthyl) anthracene derivant compound.
Other example of anthracene derivant compound also comprises the compound shown in the following structure:
R wherein 15And R 16Be independently selected from nitrogen, such as the alkyl of 1～about 6 carbon atoms, the aryl of about 6～about 30 carbon atoms.Substituent R 15And R 16Instantiation be hydrogen, methyl, the tert-butyl group, phenyl, naphthyl etc.; X and bifurcation be independently selected from hydrogen, such as the aryl of the alkyl of 1～about 6 carbon atoms, about 6～about 30 carbon atoms, alkoxyl, halogen, cyano group etc. such as 1～about 6 carbon atoms.The substituent instantiation of X and Y is hydrogen, methyl, the tert-butyl group, tert-butoxy etc.
The pyrrolotriazine derivatives examples for compounds is referring to United States Patent (USP) 6,229, and 012,6,225,467 and 6,057,048.The pyrrolotriazine derivatives examples for compounds is such as shown in the following structure:
Figure DEST_PATH_RE-G200310032888101D00082
Figure DEST_PATH_RE-G200310032888101D00091
Ar wherein 1, Ar 2, Ar 3And Ar 4Be the aryl of optional substituted 6～about 20 carbon atoms independently of one another, and aryl is such as being selected from phenyl, Stilbene, xenyl, naphthyl, pyridine radicals and quinolyl etc. this aryl optional selected from following substituting group replace once, twice or repeatedly: such as the alkyl of 1～about 6 carbon atoms, such as the alkoxyl of 1～about 6 carbon atoms, dialkyl group nitrogen base, halogen, cyano group etc. such as 1～about 3 carbon atoms; R 17～R 18Substituting group is independently selected from hydrogen, aliphatic group, and such as the alkyl of 1～about 6 carbon atoms, such as the alkoxyl of 1～about 6 carbon atoms, halogen is such as chlorine, cyano group etc.; L is a divalent group, be selected from-C (R ' R ")-, ethylidene ,-Si (R ' R ")-, oxygen atom, sulphur atom etc., wherein R ' and R " they be hydrogen atom independently of one another, contain the alkyl of 1～about 10 carbon atoms or contain the alkoxyl of 1～about 10 carbon atoms.
Light-emitting zone, particularly luminous subregion, the luminescent material that can further comprise about 0.01 weight %～about 25 weight % (based on the weight of luminous subregion) is as dopant.The example of the dopant material that can adopt in the light-emitting zone is a fluorescent material, such as cumarin, dicyano methylene pyrans, polymethine, oxa-benzanthracene, xanthene, pyrans, 2-oxyquinoline, perylene etc.Another kind of preferred fluorescent material is the quinacridone dyestuff.The illustrative example of quinacridone dyestuff comprises quinacridone, 2-acridone methylquinoline, 2,9-dimethylquinacridone, 2-chloroquine acridone, 2-fluorine quinacridone, 1,2-benzo quinacridone, N, N '-dimethylquinacridone, N, N '-dimethyl-2-acridone methylquinoline, N, N '-dimethyl-2,9-dimethylquinacridone, N, N '-dimethyl-2-chloroquine acridone, N, N '-dimethyl-2-fluorine quinacridone, N, N '-dimethyl-1,2-benzo quinacridone etc., referring to United States Patent (USP) 5,227,252; 5,276,381 and 5,59 3,788.Also the class fluorescent material that can adopt is the condensed ring fluorescent dye.The example Bao Kuo perylene of suitable condensed ring fluorescent dye, rubrene, anthracene, coronene, phenanthrene, pyrene etc., referring to United States Patent (USP) 3,172,862.Fluorescent material also comprises butadiene, such as 1, and 4-diphenyl diethylene and tetraphenylbutadiene, and Stilbene etc., referring to United States Patent (USP) 4,356,429 and 5,516,577.The example of the fluorescent material that other can adopt is referring to United States Patent (USP) 5,601,903.
In addition, the light-emitting dopant that can adopt in the light-emitting zone is a United States Patent (USP) 5,935, and 720 disclosed fluorescent dyes are such as 4-(dicyano methylene)-2-I-propyl group-6-(1,1,7,7-tetramethyl julolidine groups-9-thiazolinyl)-4H-pyrans (DCJTB); The lanthanide series metal chelant complex, such as three (the acetylacetone,2,4-pentanedione acid group closes) (phenanthroline) terbium, three (the acetylacetone,2,4-pentanedione acid group closes) (phenanthroline) europium and three (the TTA acid group closes) (phenanthroline) europium, and people such as Kido is " adopting the organic electroluminescent device that emits white light of lanthanide complex ", Jpn.J.Appl.Phys., the 35th volume, in the L394-L396 page or leaf (1996) disclosed those, also has phosphor material, such as the organo-metallic compound that contains the heavy metal atom that can produce strong spin orbit coupling, such as people such as Baldo in " efficient organic phosphorescent emissions of organic electroluminescent device ", Letters toNature, the 395th the volume, in the 151-154 page or leaf (1998) disclosed those.Preferred examples comprises 2,3,7,8,12,13,17, and 18-octaethyl-21H, 23H-phorpine platinum (II) are (PtOEP) and fac three (2-phenylpyridine) indium (Ir (ppy) 3).
Except pyrrolotriazine derivatives material and anthracene derivant material, light-emitting zone, particularly hole transport subregion can comprise that also one or more have other material of hole transport performance.The example of the hole mobile material that can adopt in the light-emitting zone comprises polypyrrole, polyaniline, poly-(phenylene vinylidene), polythiophene, United States Patent (USP) 5,728,801 disclosed polyarylamine and derivatives thereof, also has the known semiconductor organic material; Derivatives of porphyrin is such as United States Patent (USP) 4,356, and 429 is disclosed 1,10,15,20-tetraphenyl-21H, 23H-porphyrin copper (II), CuPc, tetramethyl CuPc; Phthalocyanine Zinc; The phthalocyanine titanium oxide; Magnesium phthalocyanine; Or the like.
The specific hole mobile material of one class that can adopt in the light-emitting zone is an aromatic nitrile base, such as referring to United States Patent (USP) 4,539,507.The suitable example of aromatic nitrile base includes but not limited to two (4-dimethylamino-2-aminomethyl phenyl) phenylmethanes, N, N, N-three (p-methylphenyl) amine, 1, two (the 4-di-p-tolyl aminophenyl) cyclohexanes of 1-, 1, two (4-di-p-tolyl the aminophenyl)-4-cyclohexylbenzenes of 1-, N, N '-diphenyl-N, N '-two (3-aminomethyl phenyl)-1,1 '-biphenyl-4,4 '-diamines, N, N '-diphenyl-N, N '-two (3-aminomethyl phenyl)-1,1 '-biphenyl-4,4 '-diamines, N, N '-diphenyl-N, N '-two (4-methoxyphenyl)-1,1 '-biphenyl-4,4 '-diamines, N, N, N ', N '-four p-methylphenyl-1,1 '-biphenyl-4,4 '-diamines, N, N '-two-1-naphthyl-N, N '-diphenyl-1,1 '-biphenyl-4,4 '-diamines, N, N '-two (to biphenyl)-N, N '-diphenylbenzidine (biphenyl TPD) and composition thereof etc.The preferred aromatic nitrile base of one class that can adopt in light-emitting zone is the benzidine derivative of naphthyl substituted, such as N, and N '-two (naphthalene-1-yl)-N, N '-diphenyl-benzidine (NPB).Another kind of aromatic nitrile base is a polynuclear aromatic family amine.The example of this class polynuclear aromatic family amine includes but not limited to, N, N-pair-[4 '-(tolyl amino between N-phenyl-N-)-4-xenyl] aniline; N, N-pair-[4 '-(tolyl amino between N-phenyl-N-)-4-xenyl]-meta-aminotoluene; N, N-pair-[4 '-(tolyl amino between N-phenyl-N-)-4-xenyl]-para-totuidine; N, N-pair-[4 '-(N-phenyl-N-p-methylphenyl amino)-4-xenyl] aniline; N, N-pair-[4 '-(N-phenyl-N-p-methylphenyl amino)-4-xenyl]-meta-aminotoluene; N, N-pair-[4 '-(N-phenyl-N-p-methylphenyl amino)-4-xenyl]-para-totuidine; N, N-pair-[4 '-(N-phenyl-N-rubigan amino)-4-xenyl]-meta-aminotoluene; N, N-pair-[4 '-(N-phenyl-N-m-chloro phenyl amino)-4-xenyl]-meta-aminotoluene; N, N-pair-[4 '-(N-phenyl-N-m-chloro phenyl amino)-4-xenyl]-para-totuidine; N, N-pair-[4 '-(tolyl amino between N-phenyl-N-)-4-xenyl]-parachloroanilinum; N, N-pair-[4 '-(N-phenyl-N-p-methylphenyl amino)-4-xenyl]-m-chloroaniline; N, N-pair-[4 '-(tolyl amino between N-phenyl-N-)-4-xenyl]-the 1-amino naphthalenes, and composition thereof etc.; 4,4 '-two (9-carbazyls)-1,1 '-biphenol compound, such as 4,4 '-two (9-carbazyls)-1,1 '-biphenyl and 4,4 '-two (3-methyl-9-carbazyl)-1,1 '-biphenyl etc.
The specific hole mobile material of one class that can adopt in the light-emitting zone is an indolocarbazole, such as referring to United States Patent (USP) 5,942,340 and 5,952,115, such as 5,11-dinaphthyl-5,11-indoline be [3,2-b] carbazole and 2 also, 8-dimethyl-5,11-dinaphthyl-5,11-indoline be [3,2-b] carbazole also; N, N, N ', N '-tetraarylbenzidine, wherein aryl is selected from phenyl, a tolyl, p-methylphenyl, m-methoxyphenyl, p-methoxyphenyl, 1-naphthyl, 2-naphthyl etc.N, N, N ', the illustrative example of N '-tetraarylbenzidine is N, N '-two-1-naphthyl-N, N '-diphenyl-1,1 '-biphenyl-4,4 '-diamines, more preferably this compound; N, N '-two (3-aminomethyl phenyl)-N, N '-diphenyl-1,1 '-biphenyl-4,4 '-diamines; N, N '-two (3-methoxyphenyl)-N, N '-diphenyl-1,1 '-biphenyl-4,4 '-diamines etc.
In many embodiments, light-emitting zone can comprise that one or more have non-anthracene and the non-triazine derivatives compounds of desired properties such as electric transmission and/or luminescent properties.In many embodiments, many following illustrative non-anthracenes and non-triazine derivatives compounds all have electric transmission and/or luminescent properties, therefore can be used for (such as luminous subregion and/or electric transmission subregion) in the light-emitting zone; Poly-fluorenes, such as poly-(9,9-di-n-octyl fluorenes-2, it is 7-two bases), poly-that (2,8-(6,7,12,12-tetraalkyl indenofluorene) and the copolymer that contains fluorenes, such as fluorenes-amine copolymer thing, Proceedings of SPIE Conference on OrganicLight Emitting Materials and Devices III referring to people such as Bernius, Denver, Colorado, in July, 1999, the 3797th volume, the 129th page.
Other suitable non-anthracene and non-triazine derivatives compounds comprises metal oxine type compound (oxinoid), referring to United States Patent (USP) 4,539,507; 5,151,629; 5,150,006; 5,141,671 and 5,846,666.Concrete illustrative example comprises three (oxine acid) aluminium (Alq3), two (the oxine acid group closes)-(the 4-phenylphenol closes) aluminium (Balq).Other example comprises three (oxine acid) gallium, two (oxine acid) magnesium, two (oxine acid) zinc, three (5-methyl-oxine acid) aluminium, three (7-propyl group-oxine acid group closes) aluminium, two [benzo { acid of f}-8-oxyquinoline] zinc, two (10-hydroxy benzo [h] quinolinic acid) beryllium etc.
Other the suitable non-anthracene of a class and non-triazine derivatives compounds is a stilbene derivative, such as referring to United States Patent (USP) 5,516,577.The further example of non-anthracene and non-triazine derivatives compounds is metal sulfo-oxine type (thioxiniod) compound, referring to United States Patent (USP) 5,846,666, be incorporated herein by reference in its entirety, metal sulfo-oxine type compound is such as two (8-quinoline mercaptan closes) zinc, two (8-quinoline mercaptan closes) cadmium, three (8-quinoline mercaptan closes) gallium, three (8-quinoline mercaptan closes) indium, two (5-methyl-quinoline mercaptan closes) zinc, three (5-methyl-quinoline mercaptan closes) gallium, three (5-methyl-quinoline mercaptan closes) indium, two (5-methyl-quinoline mercaptan closes) cadmium, two (3-methyl-quinoline mercaptan closes) cadmium, two (5-methyl-quinoline mercaptan closes) zinc, two [benzo f}-8-quinoline mercaptan closes] zinc, two [3-methyl benzo f}-8-quinoline mercaptan closes] zinc, two [3, the 7-dimethylbiphenyl f}-8-quinoline mercaptan closes] zinc etc.Concrete non-anthracene and non-triazine derivatives compounds are two (8-quinoline mercaptan closes) zinc, two (8-quinoline mercaptan closes) cadmium, three (8-quinoline mercaptan closes) gallium, three (8-quinoline mercaptan closes) indium and two [benzo { f}-8-quinoline mercaptan closes] zinc.Other suitable non-anthracene and non-triazine derivatives compounds is a United States Patent (USP) 5,925, and the oxadiazole metallo-chelate that 472 public affairs are opened, this class material comprise two [2-(2-hydroxy phenyl)-5-phenyl-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-phenyl-1,3, the 4-oxadiazole closes] beryllium; Two [2-(2-hydroxy phenyl)-5-(1-naphthyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-(1-naphthyl)-1,3, the 4-oxadiazole closes] beryllium; Two [5-xenyl-2-(2-hydroxy phenyl)-1,3, the 4-oxadiazole closes] zinc; Two [5-xenyl-2-(2-hydroxy phenyl)-1,3, the 4-oxadiazole closes] beryllium; Two [(2-hydroxy phenyl)-5-phenyl-1,3, the 4-oxadiazole closes] lithium; Two [2-(2-hydroxy phenyl)-5-p-methylphenyl-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-p-methylphenyl-1,3, the 4-oxadiazole closes] beryllium; Two [5-(to tert-butyl-phenyl)-2-(2-hydroxy phenyl)-1,3, the 4-oxadiazole closes] zinc; Two [5-(to tert-butyl-phenyl)-2-(2-hydroxy phenyl)-1,3, the 4-oxadiazole closes] beryllium; Two [2-(2-hydroxy phenyl)-5-(3-fluorophenyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-(4-fluorophenyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-(4-fluorophenyl)-1,3, the 4-oxadiazole closes] beryllium; Two [5-(4-chlorphenyl)-2-(2-hydroxy phenyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-(4-methoxyphenyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy-4-methyl phenyl)-5-phenyl-1,3, the 4-oxadiazole closes] zinc; Two [2-α-(2 hydroxy naphthalene base)-5-phenyl-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-is to pyridine radicals-1,3, and the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-is to pyridine radicals-1,3, and the 4-oxadiazole closes] beryllium; Two [2-(2-hydroxy phenyl)-5-(2-thienyl)-1,3, the 4-oxadiazole closes] zinc; Two [2-(2-hydroxy phenyl)-5-phenyl-1,3, the 4-thiadiazoles closes] zinc; Two [2-(2-hydroxy phenyl)-5-phenyl-1,3, the 4-thiadiazoles closes] beryllium; Two [2-(2-hydroxy phenyl)-5-(1-naphthyl)-1,3, the 4-thiadiazoles closes] zinc; With two [2-(2-hydroxy phenyl)-5-(1-naphthyl)-1,3, the 4-thiadiazoles closes] beryllium, or the like.Another kind of suitable non-anthracene and non-triazine derivatives compounds are quinoline, such as 1, and two (4-phenylchinoline-2-yl) benzene, 4,4 of 4-'-two (4-phenylchinolines-2-yl)-1,1 '-biphenyl (TA).
In many embodiments, except the organic electroluminescent material, light-emitting zone also comprises one or more hole mobile materials and/or one or more electron transport materials, these organic electroluminescent materials, hole mobile material and/or electron transport material can be in independently in the layer, such as United States Patent (USP) 4,539,507; 4,720,432 and 4,769,292 disclosed OLED; Thereby perhaps be in the mixed zone that forms two or more materials in one deck, such as United States Patent (USP) 5,853,905; 5,925,980; 6,130,001,6,114,055; 6,392,250; 6,392,339 disclosed OLED.
The thickness of light-emitting zone is not definite value, such as being pact ～about one
Figure RE-S03132888120030731D000142
As for approximately ～approximately
Figure RE-S03132888120030731D000152
Particularly about
Figure RE-S03132888120030731D000153
～approximately In many embodiments, light-emitting zone comprises two-layer or multilayer, and every layer thickness is such as being pact Approximately
Figure RE-S03132888120030731D000156
Be generally approximately ～approximately
Figure RE-S03132888120030731D000158
And it is particularly about
Figure RE-S03132888120030731D000159
～approximately
Figure RE-S03132888120030731D0001510
The composition that OLED is every layer is along being even generally or uneven on the bed thickness direction, and every layer can be made of a kind of material or be made of multiple mixtures of material fully.
Can produce this OLED by successively form required each layer in substrate by any suitable film forming technology, typical technology is method of spin coating or vacuum thermal evaporation sedimentation.About the detail content of organic light-emitting device manufacturing and operation such as referring to United States Patent (USP) 4,539,507 and 4,769,292.
With comparing with other blue light-emitting 0LED of quinoline type metallo-chelate derivative compound (being not the triazine derivatives compounds) as luminescent material as the OLED of electron transport material such as containing the anthracene derivant compound, organic luminescent device of the present invention demonstrates improved performance, and is higher and improved colorimetric purity such as operational stability.
Except as otherwise noted, all percentages and umber are all by weight.
Embodiment 1
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device A) is: ito anode (50nm)/CuPc porphyrin compound resilient coating (15nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/BH2 anthracene derivant compound light-emitting layer (30nm)/T1 triazine derivatives compounds electron transfer layer (20nm)/Mg: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).The molecular structure of CuPc, NPB, BH2 and T1 is as follows:
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 31.25mA/cm 2, it is 240cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.144,0.083) coordinate.Required driving voltage is 8.7V when operating this device under these conditions.In nitrogen atmosphere after the continued operation 60h, the decay of emissive porwer is less than 1% of initial strength under this current density.
Comparative example 1 (prior art)
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device B) is: ito anode (50nm)/CuPc porphyrin compound resilient coating (15nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/BH2 anthracene derivant compound light-emitting layer (30nm)/AlQ 3Quinoline type metallo-chelate derivative compound electron transfer layer (20nm)/Mg: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).AlQ 3Molecular structure be:
Figure RE-S03132888120030731D000181
The molecular structure of all other organic compounds embodiment that sees before.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 31.25mA/cm 2, it is 390cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.154,0.114) coordinate.Required driving voltage is 8.3V when operating this device under these conditions.In nitrogen atmosphere after the continued operation 60h, the decay of emissive porwer is about 10% of initial strength under this current density.
From the performance comparison of device A (the present invention) and B (prior art) as can be known, the colorimetric purity of device A is higher, and this point can be found out significantly from less CIE coordinate figure, especially its " y " (promptly second) coordinate.In fact, the colorimetric purity that device A is high has reached NTSC industrial standard (the blue coordinate of NTSC standard is (0.14,0.08)).Clearly, device B can not satisfy these standards.Except colorimetric purity was higher, device A compared its operational stability with device B and also is improved.Therefore, blue light-emitting OLED of the present invention compares the commercial Application that is more suitable in potential with the prior art device, because they can provide more excellent performance.
Embodiment 2
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device C) is: ito anode (50nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/SBPA anthracene derivant compound light-emitting layer (42nm)/TBT triazine derivatives compounds first electron transfer layer (10nm)/AlQ 3Quinoline derivatives compounds second electron transfer layer (20nm)/Mg: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).The molecular structure of SBPA and TBT is as follows:
Embodiment before the structure of other organic compound is seen.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 25.00mA/cm 2, it is 451cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.158,0.149) coordinate.Required driving voltage is 10.3V when operating this device under these conditions.
Comparative example 2 (prior art)
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device D) is: ito anode (50nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/SBPA anthracene derivant compound light-emitting layer (42nm)/AlQ 3Quinoline derivatives compounds electron transfer layer (20nm)/Mg: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).
Embodiment before the structure of each organic compound is seen.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 25.00mA/cm 2, it is 322cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.189,0.261) coordinate.Required driving voltage is 9.3V when operating this device under these conditions.
From the performance comparison of device C (the present invention) and D (prior art) as can be known, the colorimetric purity of device C is higher, and this point can be found out significantly from less CIE coordinate figure, especially its " y " (promptly second) coordinate.
In addition, device A and C show that the improvement of device performance of the present invention is not limited to a certain specific anthracene derivant compound or a certain specific triazine derivatives compounds.Adopt multiple anthracene derivant compound and triazine derivatives compounds all can produce the organic luminescent device of performance improvement.
Embodiment 3
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device E) is: ito anode (50nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/be doped with SBPA anthracene derivant compound light-emitting layer (42nm)/TBT triazine derivatives compounds first electron transfer layer (the 10nm)/AlQ of acridone blue light-emitting material (accounting for 1.6 volume % of luminescent layer) 3Quinoline derivatives compounds second electron transfer layer (20nm)/Mg: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).
The molecular structure of acridone blue light-emitting material is
Acridone blue light-emitting material
Embodiment before the structure of other organic compound is seen.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 25.00mA/cm 2, it is 410cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.158,0.112) coordinate.Required driving voltage is 10.4V when operating this device under these conditions.
From the contrast of device C and E colorimetric purity coordinate as can be seen, the colorimetric purity of device of the present invention can be further improved by add the blue light-emitting material in luminous subregion.
Embodiment 4
Made one group of organic luminescent device (hereinafter referred to as device F-i～F-iii), its structure is: ito anode (50nm)/CuPc porphyrin compound resilient coating (15nm)/NPB aromatic uncle amine compound hole transmission layer (30nm)/luminous subregion ground floor (2nm), it is made of SBPA, and the luminous subregion second layer (35nm), it is made of/TBT triazine derivatives compounds first electron transfer layer (8nm)/T1 triazine derivatives compounds second electron transfer layer (25nm)/Mg the mixture of SBPA anthracene derivant compound and TBT triazine derivatives compounds: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).
Embodiment before the structure of each organic compound is seen.
In device F-i, the ratio of SBPA: TBT is (volume ratio 100: 0 does not promptly contain TBT) in the luminous subregion second layer; In device F-ii, the ratio of SBPA: TBT is (volume ratio 95: 5) in the luminous subregion second layer; And in device F-iii, the ratio of SBPA: TBT is (volume ratio 75: 25) in the luminous subregion second layer.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
At current density 31.25mA/cm 2Behind the following Continuous Drive 100h, the strength ratio initial strength of device F-i, F-ii and F-iii has reduced by 40%, 30% and 23%.
Therefore as can be seen, the mixture of employing anthracene derivant compound and triazine derivatives compounds can further improve the performance of device of the present invention in luminous subregion, especially can improve the operational stability of device.It can also be seen that some mixing ratio has further improved the operational stability of device than other mixing ratio.
Embodiment 5
The structure of the organic luminescent device of manufacturing (hereinafter referred to as device G) is: ito anode (50nm)/CuPc porphyrin compound resilient coating (15nm)/NPB aromatic uncle amine compound hole transmission layer (50nm)/BH2 anthracene derivant compound and NPB aromatic nitrile base charge transport compound mixture (volume ratio 1: 1) luminescent layer (25nm)/electric transmission subregion ground floor (5nm), it is made of BH2 anthracene derivant compound, and the electric transmission subregion second layer (20nm), it is made of/Mg T1 triazine derivatives compounds: (magnesium is 9: 1 with the volume ratio of silver to the Ag negative electrode, 200nm).
Embodiment before the molecular structure of each organic compound is seen.
What adopt when making device is vacuum deposition method, and it is 5 * 10 that base is pressed -6Torr is scribbling whole organic layers and negative electrode thermal evaporation on the substrate of glass of ITO thus, and this substrate was cleaned earlier with UV-ozone clean religious services or rituals.
The current density that adopts during driving is 31.25mA/cm 2, it is 200cd/m that this device has produced intensity 2And colorimetric purity is equivalent to the blue emission of CIE figure (0.145,0.108) coordinate.Required driving voltage is 8.1V when operating this device under these conditions.Under this current density in nitrogen atmosphere behind the continued operation 600h, the emissive porwer decay only is about 10% of an initial strength.
Therefore as can be seen, in luminous subregion, adopt the mixture of anthracene derivant compound and charge transport materials, in the electric transmission subregion, adopt anthracene derivant compound and triazine derivatives compounds in addition, can obtain to have organic blue light-emitting device of the pure blue emission and the operational stability of excellence.
Can reach a conclusion from above embodiment, blue light-emitting OLED of the present invention is more suitable in potential commercial Application because they with other blue light-emitting OLED mutually specific energy more excellent performance is provided.

Claims (4)

1. device, it comprises:
Anode;
Negative electrode; With
Light-emitting zone between negative electrode and the anode, wherein this light-emitting zone comprises anthracene derivant compound and triazine derivatives compounds, and wherein the anthracene derivant compound is selected from structural formula I (A) (1)～I (A) (11), structural formula I (B), structural formula I (C) and structural formula I (D):
Figure RE-FC20016066200310032888101C00021
Figure RE-FC20016066200310032888101C00031
Figure RE-FC20016066200310032888101C00041
Substituent R wherein 1, R 2, R 3, R 4, R 5, and R 6Be selected from independently of one another: the alkyl of hydrogen, 1～24 carbon atom; The alkoxyl of 1～9 carbon atom; The triphenyl silicyl; The aryl of 6～20 carbon atoms; The heteroaryl of 5～24 carbon atoms; Halogen; And cyano group;
Figure RE-FC20016066200310032888101C00062
Substituent R wherein 7, R 8, R 9, and R 10Be selected from following each group independently of one another:
Group 1: hydrogen, the perhaps alkyl of 1～24 carbon atom;
The aryl of group 2:6～20 carbon atom;
Group 3: what constitute naphthyl, anthryl, pyrenyl Huo perylene base condenses the necessary carbon atom of aromatic rings;
The heteroaryl of group 4:5～24 carbon atom;
Group 5: furyl, thienyl, pyridine radicals or quinolyl condense assorted aromatic rings;
Alkoxyl, amino, alkylamino or the virtue of group 6:1～24 carbon atom are amino; With
Group 7: fluorine, chlorine, bromine or cyano group;
Figure RE-FC20016066200310032888101C00071
Substituent R wherein 11, R 12, R 13, and R 14Be selected from following each group independently of one another:
Group 1: nitrogen, the perhaps alkyl of 1～24 carbon atom;
The aryl of group 2:6～20 carbon atom;
Group 3: what constitute naphthyl, anthryl, pyrenyl Huo perylene base condenses the necessary carbon atom of aromatic rings;
The heteroaryl of group 4:5～24 carbon atom constitutes the assorted necessary carbon atom of aromatic rings that condenses of furyl, thienyl, pyridine radicals, quinolyl;
Alkoxyl, amino, alkylamino or the virtue of group 5:1～24 carbon atom are amino; With
Group 6: fluorine, chlorine, bromine or cyano group;
Figure RE-FC20016066200310032888101C00072
R wherein 15, and R 16Be independently selected from the alkyl of cyanogen, 1～6 carbon atom, the aryl of 6～30 carbon atoms;
X and Y are independently selected from aryl, the alkoxyl of 1～6 carbon atom, halogen, the cyano group of the alkyl of hydrogen, 1～6 carbon atom, 6～30 carbon atoms; And the triazine derivatives compounds is selected from structural formula II (A), II (B), II (C) and II (D):
Figure RE-FC20016066200310032888101C00081
Ar wherein 1, Ar 2, Ar 3, and Ar 4, be the aryl of 6～20 carbon atoms independently of one another; R 17～R 18Substituting group is independently selected from aliphatic group, the alkoxyl of 1～6 carbon atom, halogen, the cyano group of hydrogen, 1～6 carbon atom; And L is a divalent group, be selected from-C (R ' R ")-, ethylidene ,-Si (R ' R ")-, oxygen atom, sulphur atom, wherein R ' and R " be hydrogen atom independently of one another, the alkoxyl that contains the alkyl of 1～10 carbon atom and contain 1～10 carbon atom.
2. the device of claim 1, wherein the anthracene derivant compound is selected from structural formula I (A) (4) and structural formula I (D).
3. the device of claim 1, wherein the triazine derivatives compounds is selected from structural formula II (B).
4. the device of claim 1, wherein the anthracene derivant compound is
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US7169482B2 (en) 2007-01-30
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US20040018383A1 (en) 2004-01-29
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